Physical Interfaces
1. Telephone interface: 4FXO, RJ-11
2. Ethernet Interface: 4*RJ-45 10/100 Base-Tx, RJ-45

Voice & Fax
1. G.711A/U law, G.723.1, G.729A/B
2. Comfort Noise Generation (CNG)
3. Voice Activity Detection (VAD)
4. Echo Cancellation (G.168)
5. Adaptive (Dynamic) Jitter Buffer
6. Programmable Gain Control
7. T.38/Pass-through/Modem FAX mode, Up to 14.4kbps
8. DTMF mode: Signal/RFC2833/INBAND

Protocol
1. SIP V2.0 (RFC 3261, 3262, 3264)
2. IMS/3GPP
3. SDP (RFC 2327)
4. REFER (RFC 3515)
5. RTP/RTCP (RFC 1889,1890)
6. STUN (RFC 3489)
7. ARP/RARP (RFC 826/903)
8. SNTP (RFC 2030)
9. DHCP/PPPoE
10. TFTP/HTTP/HTTPS
11. DNS/DNS SRV (RFC 1706/RFC 2782)
12. VLAN 802.1P/802.1Q

FXO Port
1. Busy tone detection
2. No current take out stitches detection
3. Voice interrupted detection
4. One stage dialing
5. Two stage dialing
6. PSTN exterior ports polling
7. Polarity Reversal
8. FAS (Fake billing correction)
9. DC/AC impedance config
10. Calls detection (Bellcore Type 1&2,

Maintain & Upgrade
1. Web based configuration
2. Telnet configuration
3. Data backup/restore
4. Support English and Chinese language
5. Firmware upgrade by TFTP
6. Web & telnet login password modify
7. Factory reset
8. Automatic time synchronization
9. SNMP
10. IVR local maintenance management

Call & Routing
1. FXO port group
2. IP Trunk
3. Primary and secondary SIP account
4. 32inbound routing
5. 32outbound routing
6. Number manipulation
7. Dial plan set Call

Network Features
1. NAT (Rout& Bridge)
2. Static IP, PPPoE, DHCP
3. DHCP server
4. MAC address clone
5. DMZ
6. IP, TCP, UDP, TFTP, FTP, TCP, ARP, RARP, Ping, NTP, SNTP, Http, DNS, Tracert
7. Static/dynamic ARP

Private Service
1. Inquire LAN port IP *158#
2. Inquire WAN port IP *159#
3. Get IP address *150*
4. Restart *111#
5. Factory reset *166*000000#